/Engine/Source/Runtime/Engine/Public/PrimitiveSceneProxy.h
static void DrawArrowHead ( [FPrimitiveDrawInterface](API\Runtime\Engine\FPrimitiveDrawInterface) * PDI, const FVector & Tip, const FVector & Origin, const float Size, const [FLinearColor](API\Runtime\Core\Math\FLinearColor) & Color, uint8 DepthPriorityGroup, const float Thickness, const bool bScreenSpace )